SUBWOOFER: 18" DUAL VOICE COILCONE: NON-PRESSED CONE FOAM EDGEVOICE COIL(BSV): 4-LAYERS, 4"MAGNET: 100 OZ x 3RMS POWER: 4500WMAX POWER: 13500WFREQ.RESP.: 25HZ-300HZSPL: 94dB/W/MIMPEDANCE: 1 OHM+1 OHM